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Alexander II from 1214-1249
Battle of Bouvines (27 July 1214)
Two or more numbers are needed to find their common factors.
But the factors of 1214 are: 1, 2, 607 and itself 1214
If you mean the ratio 12 : 14, then its simplest form would be 6 : 7.
The Least Common Multiple of 1214, 16: 9,712